CAD does not need training. It will be ready in half a month. It's a little more difficult than WORD. I am a mold designer. I found it myself. In fact, there are only a few commonly used commands, and there are many hidden commands that training institutions may not know and will not teach you. In addition, if you only know CAD, it is difficult to find a job. There are too many people who can. Whether you paint glasses or something else, the salary of painting alone will not be high, at least.